DIY Trebuchet Catapult Construction

My second large, wooden, hanging counterweight trebuchet and the first well-documented one; this treb will consist of ~6′ components that are all bolted together, allowing for some degree of siege mobility.

I want to hear your trebuchet-tips! This project is just starting and will be updated gradually as things progress; I’m sure there’s some latent treb-knowledge in the heads of many tutorials. Let me know what you think of current plans and where you’d like to see the trebuchet go. Favorite arm- ratios, clever trigger systems, winching mechanisms, sling designs…I’d loveto try implementing them. I’ve never attempted a large scale floating arm trebuchet, but if you’re convincing enough, I just might. If you’d like to be a collaborator, let me know and I’ll try to add you on.

Also, I’m an enormous SketchUp fan. I’ll try to present screenshots of any models I use but viewing and helping with this tutorial will be easier if you just download the (free) software here.